Retro68/gcc/liboffloadmic/runtime/offload_iterator.h

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/*! \file
    \brief Iterator of Variable tables list used by the runtime library
*/

#ifndef OFFLOAD_ITERATOR_H_INCLUDED
#define OFFLOAD_ITERATOR_H_INCLUDED

#include <iterator>
#include "offload_table.h"

// The following class is for iteration over var table.
// It was extracted and moved to this offload_iterator.h file from offload_table.h
// to solve the problem with compiling with VS 2010. The problem was in incompatibility
// of STL objects in VS 2010 with ones in later VS versions.

// var table list iterator
class Iterator : public std::iterator<std::input_iterator_tag,
                                          VarTable::Entry> {
    public:
        Iterator() : m_node(0), m_entry(0) {}

        explicit Iterator(TableList<VarTable>::Node *node) {
            new_node(node);
        }

        Iterator& operator++() {
            if (m_entry != 0) {
                m_entry++;
                while (m_entry->name == 0) {
                    m_entry++;
                }
                if (m_entry->name == reinterpret_cast<const char*>(-1)) {
                    new_node(m_node->next);
                }
            }
            return *this;
        }

        bool operator==(const Iterator &other) const {
            return m_entry == other.m_entry;
        }

        bool operator!=(const Iterator &other) const {
            return m_entry != other.m_entry;
        }

        const VarTable::Entry* operator*() const {
            return m_entry;
        }

    private:
        void new_node(TableList<VarTable>::Node *node) {
            m_node = node;
            m_entry = 0;
            while (m_node != 0) {
                m_entry = m_node->table.entries;
                while (m_entry->name == 0) {
                    m_entry++;
                }
                if (m_entry->name != reinterpret_cast<const char*>(-1)) {
                    break;
                }
                m_node = m_node->next;
                m_entry = 0;
            }
        }

    private:
        TableList<VarTable>::Node                *m_node;
        const VarTable::Entry  *m_entry;
};

#endif  // OFFLOAD_ITERATOR_H_INCLUDED